[Superman]

I understand what you're saying, and there are some forms of fuel that take more energy to produce than they create. Hydrogen, for example. But biodiesel is not this way. It will become incorporated into our fuel supply system, and already has, and it will add many more BTU's than it costs. There are those who would have you believe that these sources are terribly inefficient, but in some cases those reports are not entirely candid. The link didn't work for me but again, we will make fuel from stuff we grow in the ground, and it will be cost-efficient. Already is.